<label>Total sin iva:</label>
<?php echo input_tag("total_valor_factura", "", array ('disabled'=>true, "id"=>"total_valor_factura")) ?>
<br />
<label>Total Iva:</label>
<?php echo input_tag("total_iva_factura", "", array ('disabled'=>true, "id"=>"total_iva_factura")) ?>
<br />
<label>Total:</label>
<?php echo input_tag("total_factura", "", array ('disabled'=>true, "id"=>"total_factura")) ?>